Recent Progress in Sr2Fe1.5Mo0.5O6‐δ‐Based Multifunctional Materials for Energy Conversion and Storage

Abstract Perovskite oxides, particularly double perovskite oxides, have drawn significant research interest within the fields of solid‐state chemistry and materials science. As a quintessential double perovskite oxide, Sr 2 Fe 1.5 Mo 0.5 O 6‐δ (SFM) has unique electronic, magnetic, and catalytic properties. These attributes make it a promising candidate for energy conversion and storage applications. This review offers a comprehensive overview of advancements using SFM across various applications, including solid oxide cells, protonic ceramic cells, and electrocatalysis. Notably, the review highlights emerging optimization strategies that enhance functionality based on a fundamental understanding of the reaction mechanisms. The review concludes by discussing the persistent challenges facing SFM‐based functional materials, as well as their prospects, considering both fundamental research and industrial applications.